extern int dlacon_(integer *n, doublereal *v, doublereal *x, integer *isgn, doublereal *est, integer *kase);
/*:ref: dasum_ 7 3 4 7 4 */
/*:ref: idamax_ 4 3 4 7 4 */
/*:ref: dcopy_ 14 5 4 7 4 7 4 */
